Water vapor coming from A/C vents

[Ex Euro Driver]

Hey all, got a 2014 Denali and have had zero issues. As of late, I've been having intermittent aerosolized water vapor coming from the A/C vents. It doesn't smell and is white in color. I've never had a vehicle do this. Any ideas on why this is happening? Thanks in advance.

 

[sumo]

Most of the time it's nothing. Cold air coming in contact with warm humid air. I also seen it where access water was accumulating in the heater box due to a clogged drain port. Check your drain and make sure you see in draining under the truck properly